BRIT PICK: MObama went all-British Wednesday for her appearances for Chinese President Hu Jintao. In the morning, the First Lady donned a Roksanda Ilincic beaded wool and duchess silk satin dress and wool coat from the London-based designer’s fall 2010 collection. The look is available at Net-a-porter.com, Blake in Chicago and Linda Dresner in Michigan. “She accessorized it perfectly,” remarked Ilincic, who got a call about the high-profile plug while fitting garments for her next runway show. “The red gloves complete the outfit and are, of course, also a fitting color for the occasion.” That night, for the state dinner at the White House, Obama continued the London theme, stepping out in a red, petal-print organza gown by Alexander McQueen.